debian rules flags
correctly handle CASADI_MODULES and CASADI_PLUGINS in cmake
Revert "correctly handle CASADI_MODULES and CASADI_PLUGINS in cmake"

This reverts commit ba7f6b8c9c438368a3bd9ffe7554e6f1f0842d59.
remove WITH_PYTHON since it doesn't do anything right now
#1121: add libs target